We're talking about "the poor" in a macroeconomic sense. Per capita income in the U.S. is about $47,000 annually. In India it's just $3,560,
according to the World Bank
. One of these groups is "poor" by comparison.

Look at this chart (below) of smartphone market share broken down by price. Nearly 60% of Android phones sold cost less than $200. Android's core market barely bothers with the $200-$400 midrange, and only about 20% of sales are in the premium $400-plus area:

Apple, with its iOS mobile operating system, by contrast, sells the vast majority of its devices - more than 80% - in the $400-plus range. The company barely bothers with the midrange, and sells
zero
phones under $200.

Android phone makers could price their wares in the $200-$400 range - but they don't. They sell most phones for $200 or less. That strongly suggests that Android makers know there is a huge chunk of the market that is price-sensitive on phones.

Price isn't an exact proxy for consumer income of course. Some people who buy a $200 phone can afford a $400 but choose the cheaper one anyway.

Nevertheless, it is also true that anyone who buys an Apple phone at $400-plus can also afford a $200 handset
but chooses not to.
Meanwhile, anyone who can
only
afford a $200 phone cannot, by definition, buy an Apple phone.